Local resilience of the $1T$-TiSe${}_2$ charge density wave to Ti self-doping

Abstract

In Ti-intercalated self-doped $1T$-TiSe${}_2$ crystals, the charge density wave (CDW) superstructure induces two nonequivalent sites for Ti dopants. Recently, it has been shown that increasing Ti doping dramatically influences the CDW by breaking it into phase-shifted domains. Here, we report scanning tunneling microscopy and spectroscopy experiments that reveal a dopant-site dependence of the CDW gap. Supported by density functional theory, we demonstrate that the loss of the longrange phase coherence introduces an imbalance in the intercalated-Ti site distribution and restrains the CDW gap closure. This local resilient behavior of the $1T$-TiSe${}_2$ CDW reveals a novel mechanism between CDW and defects in mutual influence.

5 pages, 4 figures

References in corpus (5)

• Controlling many-body states by the electric-field effect in a two-dimensional material
• Spontaneous exciton condensation in 1T-TiSe2: a BCS-like approach
• Observation of a Charge Density Wave Incommensuration Near the Superconducting Dome in CuxTiSe2
• Doping nature of native defects in 1T-TiSe2
• Stripe and short range order in the charge density wave of 1T-Cu${}_x$TiSe${}_2$

Cited by in corpus (1)

• Carrier-Density Control of the Quantum-Confined 1$T$-TiSe${}_2$ Charge-Density-Wave